"Our friend and bandmate Ted has been feeling unwell for a few days, and yesterday he was taken to a hospital to receive emergency treatment," the group said. "The scans revealed a blood clot on the surface of his brain that requires an operation. Ted is receiving excellent care and we are being assured that he will recover quickly from surgery."

The postponed tour dates are set to be rescheduled. The list goes as follows:

Mumford & Sons added in its statement that there are "no plans to cancel or postpone any other appearances along this current tour." The group, which performed in Texas last week, is later this month set to perform in Tennessee, Kansas and Colorado and afterwards, head to the United Kingdom, Japan and Canada. The band has more U.S. gigs scheduled for September.